一种磁聚焦技术在磁耦合无线电能传输中的应用

Application of Magnetic Focusing Technology in Magnetically Coupled Wireless Power Transmission

磁耦合谐振式无线电能传输中单发射机功率受限,接收端感应电压难以取得显著提升。可以采用多发射机电路模型,多个发射器同时将功率无线传输到单个接收器。其中发射端采用多线圈阵列模型,与单线圈接收机耦合“共振”传输能量,形成MISO(Multiple Input Single Output)系统。采用磁聚焦技术分析线圈电流组合对系统输出的影响,通过改进粒子群算法(IPSO)求解最优输入解,得到的磁场聚焦性能更好,能量分布更加集中。实验证明,模型可以有效提升接收增益,降低系统损耗。

In magnetically coupled resonant radio transmission,the power of single transmitter is limited and the induced voltage of receiver is difficult to improve significantly.Multi-transmitter circuit model can be employed,using multiple transmitters to wirelessly transmit power to a single receiver simultaneously.A multicoil array model is used to couple with a single-coil receiver to“resonate”to transmit energy,forming a MISO(multiple input single output)system.Then,magnetic focusing technology is used to analyze the influence of the coil current combination on the system output,the optimal input solution is determined by using improved particle swarm optimization(IPSO),the magnetic field focusing performance is better,and the energy distribution is more concentrated.Experimental re-sults show that the model can effectively improve the receiving gain and reduce system loss.